LOINCActiveBoth

LOINC Code 83124-8: T3 IA [Mass/Vol]

83124-8 is a LOINC code used to identify T3 IA [Mass/Vol] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Triiodothyronine. It is commonly used with the system or sample type Ser/Plas.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Triiodothyronine. It is commonly used with the system or sample type Ser/Plas.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Order vs observation: Both
  • Method: IA

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Triiodothyronine (T3) [Mass/volume] in Serum or Plasma by Immunoassay
  • Triiodothyronine
  • This term was created for, but is not limited in use to, bioMerieux's VIDAS T3 assay, which is intended for the quantitative measurement of triiodothyronine (T3) in human serum or plasma.
  • Chemistry; EIA; ELFA; ELISA; Endocrine; Endocrinology; Enzyme immunoassay; IAA; Level; Mass concentration; MEIA; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; SUDS; T3; T-3; thyroid hormone; Total T3; Triodothyrne

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

T3 IA [Mass/Vol]Triiodothyronine (T3) [Mass/volume] in Serum or Plasma by ImmunoassayT3 SerPl IA-mCncTriiodothyronineCHEMT3, BloodMCnc

Frequently asked questions

Code details

Code83124-8
SystemLOINC
Display nameT3 IA [Mass/Vol]
DescriptionTriiodothyronine
Short nameT3 SerPl IA-mCnc
ComponentTriiodothyronine
PropertyMCnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
MethodIA
ClassCHEM
Example unitsng/mL
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.58
Last changed2.58

Consumer names

T3, Blood

Part names

TriiodothyronineMCncPtSer/PlasQnIAMass ConcentrationPoint in time (spot)Serum or PlasmaImmunoassay

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 83124-8 | HealthAssure